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FORUMS Photography Talk by Genre General Photography Talk 
Thread started 13 Nov 2009 (Friday) 14:04
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Focusing Screen

 
slkfis
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Nov 13, 2009 14:04 |  #1

I can't find my answer by searching this forum so I'll ask.

A friend gave me a EF CZR-9566 grided focusing screen that he said would fit my 40D.

Will this type of screen help a newbie with bifocals learn to manually focus better? My manuals don't do to well and I've read many threads about bifocals.

All replies appreciated.

thxs

slkfis
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gjl711
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Nov 13, 2009 14:18 |  #2

Not really, but it will help you get horizons straight. For manual focusing it might be better if you adjust the camera diopter so that you shoot without glasses.


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net_tech
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Nov 13, 2009 14:39 |  #3

Ef-D is the focusing screen for 40d (just got one myself) figured it would be easier to look at the grid in the viewfinder than at the HOT SHOE TWO AXIS BUBBLE LEVEL on the top of the camera


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Wilt
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Nov 13, 2009 17:57 |  #4

A focusing screen really does not help someone with bifocals...it is more beneficial to first adjust the adjustable diopter control next to the eyepiece, so that you can look into the viewfinder and see a sharp image of the focus points. Remove the lens to adjust the diopter control, since you will be better able to concentrate on how well/poorly you see the focus points.


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slkfis
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Nov 13, 2009 20:03 |  #5

Hi Folks,
I appreciate the replies. I have adjusted the diopter and this helps a lot. Some how I felt there might be some magic in the different focusing screen.

Thxs very much

slkfis
good ol bob


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Wilt
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Nov 13, 2009 20:15 |  #6

slkfis wrote in post #9011137 (external link)
Hi Folks,
I appreciate the replies. I have adjusted the diopter and this helps a lot. Some how I felt there might be some magic in the different focusing screen.

Thxs very much

slkfis
good ol bob

If you weren't seeing the screen well, a different focusing screen would not make it better. A screen like the EF-S for the 40D will improve the focusing with f/2.8 lenses simply because it is a bit coarser than the standard screen. The standard screens are made for best screen brightness at the expense of fineness of focus, since part of the light is lost because it is diverted thru the half-silvered mirror to the AF sensor.


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beeng
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Nov 13, 2009 20:23 |  #7

Doesn't the 40D have a dioptric adjuster so that you can use it without glasses? I don't wear glasses, so I don't know much about this stuff. I just remember reading something about it in my 10d manual ages ago.


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20droger
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Nov 13, 2009 23:26 |  #8

beeng wrote in post #9011233 (external link)
Doesn't the 40D have a dioptric adjuster so that you can use it without glasses? I don't wear glasses, so I don't know much about this stuff. I just remember reading something about it in my 10d manual ages ago.

Yes, it does. It's the lttle wheel right next to the eyepiece.

Turn the camera off and set the lens to "MF", point the camera at a blank wall, intentionally misfocus it so the wall is soft and fuzzy in the eyepiece, then adjust the diopter wheel until the little autofocus squares are as sharp as possible. This will bring the eyepiece into focus on the focus screen for your individual eye.




  
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Wilt
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Nov 14, 2009 00:19 |  #9

20droger wrote in post #9011974 (external link)
Yes, it does. It's the lttle wheel right next to the eyepiece.

Turn the camera off and set the lens to "MF", point the camera at a blank wall, intentionally misfocus it so the wall is soft and fuzzy in the eyepiece, then adjust the diopter wheel until the little autofocus squares are as sharp as possible. This will bring the eyepiece into focus on the focus screen for your individual eye.

Or just remove the lens to adjust the diopter


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Focusing Screen
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